Table 1.

Summary of group differences in the preference for different alcohol concentrations during the 2-week drinking period.

Day 1	EtOHadolescents had a higher 5% and lower 40% preference, compared to wd1EtOHadults (p < 0.001 and p = 0.014, respectively)
Day 2	EtOHadolescents had a higher 10% and a lower 20% preference, compared to wd1EtOHadults (p = 0.047 and p = 0.003, respectively)
Day 3	EtOHadolescents had a higher 40% preference, compared to wd1EtOHadults (p = 0.037)
Day 4	No differences
Day 5	EtOHadolescents had a higher 5 and 10% (p = 0.009 and p = 0.007, respectively), but lower 20 and 40% preference, compared to wd1EtOHadults (p = 0.005 and p < 0.001, respectively)
Day 6	No differences
Day 7	EtOHadolescents had a higher 5%, but lower 20%, preference, compared to wd1EtOHadults (p = 0.002 and p = 0.014, respectively)
Day 8	No differences
Day 9	EtOHadolescents had a higher 5%, but lower 10%, preference, compared to wd1EtOHadults (p = 0.005 and p = 0.022, respectively)
Day 10	EtOHadolescents had a higher 5% preference, compared to wd1EtOHadults (p = 0.001)
Day 11	EtOHadolescents had a lower 10%, but higher 40%, preference, compared to wd1EtOHadults (p = 0.002 and p = 0.037, respectively).
Day 12	EtOHadolescents had a higher 40% preference, compared to wd1EtOHadults (p < 0.001)
Day 13	EtOHadolescents had a higher 10%, lower 20%, higher 40% (p = 0.048, p = 0.002, and p = 0.014), compared to wd1EtOHadults
Day 14	EtOHadolescents had a lower 10 and 20%, but higher 40%, preference, compared to wd1EtOHadults (p = 0.04, p = 0.031, p < 0.001)

Results of post hoc analysis of the day × age × concentration interaction [F(39,624) = 4.62, p < 0.001] in EtOH^adolescents and wd1EtOH^adults; n = 9/group.